Cohort Retention Analyzer
Measure return activity by first-observed weekly or monthly cohorts.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Cohort Retention Analyzer
- Open or paste your data, or load the working sample.
- Choose columns and explicit processing rules. Review the proposed result and warnings.
- Download the chosen result dataset, JSON artifact or report; save a draft to continue later.
What are the limits of Cohort Retention Analyzer?
Cohorts begin at the first observed event per user in your input, not verified signup dates. Period retention counts distinct active users, not rolling/unbounded retention. Unfinished and unobserved periods stay blank. Supply the final complete observation date; imported history truncation can bias acquisition cohorts. Reports contain aggregate cohorts, not user identifiers. Inputs stay in browser memory. No workbook is created. Table limits: 5 MB total text, 25,000 rows, 64 columns and 200,000 cells; expensive operations have stricter limits. Processing can be cancelled.